Published December 2, 2022 © GPL3+

Pomodoro with Arduino!

Feeling bored with mobile pomodoro app? Why not building one for yourself! This project provides users to focus based on your preferences!

IntermediateFull instructions provided348

Things used in this project

Hardware components

Arduino UNO

Alphanumeric LCD, 16 x 2

Resistor 221 ohm

Rotary potentiometer (generic)

Pushbutton Switch, Push-Pull

Solderless Breadboard Full Size

Jumper wires (generic)

Buzzer

Software apps and online services

Arduino IDE

Story

Pomodoro is a timer that helps people to focus on their works and studies. A Pomodoro session takes up 30 minutes which are 25 minutes for concentrating and 5 minutes for rest.

This project consists of three push buttons. The leftmost button allows users to shift to the left while button in middle allows users to shift to the right in the menu interface. The rightmost button allows users to select the desired mode of pomodoro. Firstly, users will be greeted with a welcoming message and a sweet melody. It comes with two different modes, "auto" and "custom".

"auto" mode allows users to run limitlessly. This option promotes high flexibility as users can choose to continue or terminate the session according to their preferences. Once each 30 minutes session is completed, there will be a checkpoint notifying users how many Pomodoro sessions and durations spent. When the users opt to terminate the process, such summary will be displayed as an achievement.

On the other hand, "custom" mode allows users to select how many hours they wish to execute from 1 to 8 hours.

A quick run-through with the function (the timer setup has been shorten for demo purpose)

Code

Pomodoro codiing

#include <LiquidCrystal.h>
//LCD pinMode setup
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

//music tone setup for "SO" (G), "LA" (A), "TI" (B), "DO" (C)
int abc[] = {3920, 4400, 4940, 5230};

//variables declaration
signed short minutes, secondes;
char timeline[16];
char countf[16];
int buzzerpin = 7;
int rightButton = 8;
int leftButton = 9;
int selectButton = 10;
int menu = 1;
int flag = 0;
int count = 0;
int mins;
int sec;
int total;

//----------------------------------------- SETUP PROGRAM ---------------------------------------------------
void setup(){
  lcd.begin(16,2);
  pinMode(rightButton, INPUT_PULLUP);
  pinMode(leftButton, INPUT_PULLUP);
  pinMode(selectButton, INPUT_PULLUP);
  pinMode(buzzerpin, OUTPUT);

  lcd.setCursor(3,0);
  lcd.print("WELCOME TO");
  for(int i = 0; i < 4; i++) //playing welcoming melody
  {
    mtone(buzzerpin, abc[i], 500); 
    delay(50);
    lcd.setCursor(4,1);
  lcd.print("POMODORO");
  }

  updateMenu();

}
//------------------------------------- PUSHBUTTON INPUT DETECTION ---------------------------------------------
//flag 0 for "auto" and "custom"  (general mode) menu interface
//flag 1 for "Yes" and "no" (continue confirmation) menu interface
//flag 2 for custom option mode menu interface
//mtone() function play a tone if sny switch was pressed
//Notice that there is a tone different between "select button" and "left/right buttion"

void loop(){
  if(!digitalRead(leftButton)){
    mtone(buzzerpin, abc[0], 50); 
    menu++;
    if (flag == 0){
      mtone(buzzerpin, abc[0], 50); 
      updateMenu();
    }
    else if (flag == 1){
      mtone(buzzerpin, abc[0], 50); 
      updateMenu2();
    }
    else if (flag == 2){
      mtone(buzzerpin, abc[0], 50); 
      updateMenu3();
    }
    delay(100);
    while(!digitalRead(leftButton));
  }
  if(!digitalRead(rightButton)){
   
    menu--;
    if (flag == 0){
      mtone(buzzerpin, abc[0], 100); // abc[i] tone sound for 0.5 second
      updateMenu();
    }
    else if (flag == 1){
      mtone(buzzerpin, abc[0], 100); // abc[i] tone sound for 0.5 second
      updateMenu2();
    }
    else if (flag == 2){
      mtone(buzzerpin, abc[0], 100); // abc[i] tone sound for 0.5 second
      updateMenu3();
    }
    delay(100);
    while(!digitalRead(rightButton)); 
  }
  if(!digitalRead(selectButton)){
    if (flag == 0){
    mtone(buzzerpin, abc[3], 50); // abc[i] tone sound for 0.5 second
    executeAction();
    }
    else if (flag == 1){
     mtone(buzzerpin, abc[3], 50); // abc[i] tone sound for 0.5 second
    updateMenu2();
    confirm();
    }
    else if (flag == 2){
     mtone(buzzerpin, abc[3], 50); // abc[i] tone sound for 0.5 second
    action2();
    }
    delay(100);
    while(!digitalRead(selectButton));
  }
  
}
//--------------------------------------------- General Mode Menu Display -----------------------------------------------
void updateMenu(){
  switch(menu){
    case 0: //auxiliary condition
    menu = 1;
    break;
    
    case 1: //Select option 1 - AUTO interface
    lcd.clear();
    lcd.print("---- OPTION ----");
    lcd.setCursor(1,1);
    lcd.print("~AUTO");
    lcd.setCursor(9,1);
    lcd.print("CUSTOM");
    break;

    case 2: //Select option 2- CUSTOM interface
    lcd.clear();
    lcd.print("---- OPTION ----");
    lcd.setCursor(2,1);
    lcd.print("AUTO");
    lcd.setCursor(8,1);
    lcd.print("~CUSTOM");
    break;

    case 3:
    menu = 2;
    break;
  }
}
//------------------------------------------- Function Execution for auto and custom ----------------------------------
void executeAction(){
    switch(menu){
      case 1:
      flag = 0;
      delay(100);
      action1();
      break;

      case 2:
      menu = 1;
      flag = 2;
      updateMenu3();
      break;
    }
}

void action1(){
  lcd.clear();
  lcd.print("---- ALERT! ----");
  buzz();
  for (int i=5;i>=0;i--){
    lcd.setCursor(1,1);
    lcd.print("GET READY IN ");
    lcd.setCursor(14,1);
    lcd.print(i);
    delay(1000);
  }

  timedisplay();
  delay(2000);
}

//----------------------------------- custom mode menu display ----------------------------------==
void updateMenu3(){
  switch(menu){
    case 0: //auxiliary condition
    menu = 1;
    break;
    
    case 1: //Select option 1 - AUTO interface
    delay(100);
    lcd.clear();
    lcd.print("---- OPTION ----");
    lcd.setCursor(1,1);
    lcd.print("~1HR");
    lcd.setCursor(7,1);
    lcd.print("2HR");
    lcd.setCursor(12,1);
    lcd.print("3HR");
    break;

    case 2: //Select option 2- CUSTOM interface
    delay(100);
    lcd.clear();
    lcd.print("---- OPTION ----");
    lcd.setCursor(2,1);
    lcd.print("1HR");
    lcd.setCursor(6,1);
    lcd.print("~2HR");
    lcd.setCursor(12,1);
    lcd.print("3HR");
    break;

    case 3:
    delay(100);
    lcd.clear();
    lcd.print("---- OPTION ----");
    lcd.setCursor(2,1);
    lcd.print("1HR");
    lcd.setCursor(7,1);
    lcd.print("2HR");
    lcd.setCursor(11,1);
    lcd.print("~3HR");
    break;

    case 4: //Select option 1 - AUTO interface
    delay(100);
    lcd.clear();
    lcd.print("---- OPTION ----");
    lcd.setCursor(1,1);
    lcd.print("~4HR");
    lcd.setCursor(7,1);
    lcd.print("5HR");
    lcd.setCursor(12,1);
    lcd.print("6HR");
    break;

    case 5: //Select option 2- CUSTOM interface
    delay(100);
    lcd.clear();
    lcd.print("---- OPTION ----");
    lcd.setCursor(2,1);
    lcd.print("4HR");
    lcd.setCursor(6,1);
    lcd.print("~5HR");
    lcd.setCursor(12,1);
    lcd.print("6HR");
    break;

    case 6:
    delay(100);
    lcd.clear();
    lcd.print("---- OPTION ----");
    lcd.setCursor(2,1);
    lcd.print("4HR");
    lcd.setCursor(7,1);
    lcd.print("5HR");
    lcd.setCursor(11,1);
    lcd.print("~6HR");
    break;

    case 7: //Select option 1 - AUTO interface
    delay(100);
    lcd.clear();
    lcd.print("---- OPTION ----");
    lcd.setCursor(1,1);
    lcd.print("~7HR");
    lcd.setCursor(7,1);
    lcd.print("8HR");
    lcd.setCursor(12,1);
    lcd.print("BCK");
    break;

    case 8: //Select option 2- CUSTOM interface
    delay(100);
    lcd.clear();
    lcd.print("---- OPTION ----");
    lcd.setCursor(2,1);
    lcd.print("7HR");
    lcd.setCursor(6,1);
    lcd.print("~8HR");
    lcd.setCursor(12,1);
    lcd.print("BCK");
    break;

    case 9:
    delay(100);
    lcd.clear();
    lcd.print("---- OPTION ----");
    lcd.setCursor(2,1);
    lcd.print("7HR");
    lcd.setCursor(7,1);
    lcd.print("8HR");
    lcd.setCursor(11,1);
    lcd.print("~BCK");
    break;

    case 10:
    menu = 9;
    break;
  }
}

//-------------------------- Function execution for each custom mode option -----------------------------------------
void action2(){                     
    switch(menu){
      case 0:
      menu = 1;
      break;
      
      case 1:
      lcd.clear();
      flag = 2;
      for (int i = 0; i < 2; i++){
      action1();
      }
      lcd.clear();
      lcd.print("SESSION");
      
      lcd.setCursor(0,1);
      lcd.print("ENDED");
      for (int i = 0; i <3; i++){
        digitalWrite(buzzerpin, HIGH);
        delay(100);
        digitalWrite(buzzerpin, LOW);
        delay(100);
      }
      delay(2000);
      updateMenu3();
      flag = 2;
      count = 0;
      break;

      case 2:
      lcd.clear();
      flag = 2;
      for (int i = 0; i < 4; i++){
      action1();
      }
      lcd.clear();
      lcd.print("SESSION");
      lcd.setCursor(0,1);
      lcd.print("ENDED");
      for (int i = 0; i <3; i++){
        digitalWrite(buzzerpin, HIGH);
        delay(100);
        digitalWrite(buzzerpin, LOW);
        delay(100);
      }
      delay(1000);
      updateMenu3();
      flag = 2;
      count = 0;
      break;

      case 3:
      lcd.clear();
      flag = 2;
      for (int i = 0; i < 6; i++){
      action1();
      }
      lcd.clear();
      lcd.print("SESSION");
      lcd.setCursor(0,1);
      lcd.print("ENDED");
      for (int i = 0; i <3; i++){
        digitalWrite(buzzerpin, HIGH);
        delay(100);
        digitalWrite(buzzerpin, LOW);
        delay(100);
      }
      delay(1000);
      updateMenu3();
      flag = 2;
      count = 0;
      break;

      case 4:
      lcd.clear();
      flag = 2;
      for (int i = 0; i < 8; i++){
      action1();
      }
      lcd.clear();
      lcd.print("SESSION");
      lcd.setCursor(0,1);
      lcd.print("ENDED");
      for (int i = 0; i <3; i++){
        digitalWrite(buzzerpin, HIGH);
        delay(100);
        digitalWrite(buzzerpin, LOW);
        delay(100);
      }
      delay(1000);
      updateMenu3();
      flag = 2;
      count = 0;
      break;

      case 5:
      lcd.clear();
      flag = 2;
      for (int i = 0; i < 10; i++){
      action1();
      }
      lcd.clear();
      lcd.print("SESSION");
      lcd.setCursor(0,1);
      lcd.print("ENDED");
      for (int i = 0; i <3; i++){
        digitalWrite(buzzerpin, HIGH);
        delay(100);
        digitalWrite(buzzerpin, LOW);
        delay(100);
      }
      delay(1000);
      updateMenu3();
      flag = 2;
      count = 0;
      break;

      case 6:
      lcd.clear();
      flag = 2;
      for (int i = 0; i < 7; i++){
      action1();
      }
      lcd.clear();
      lcd.print("SESSION");
      lcd.setCursor(0,1);
      lcd.print("ENDED");
      for (int i = 0; i <3; i++){
        digitalWrite(buzzerpin, HIGH);
        delay(100);
        digitalWrite(buzzerpin, LOW);
        delay(100);
      }
      delay(1000);
      updateMenu3();
      flag = 2;
      count = 0;
      break;

      case 7:
      lcd.clear();
      flag = 2;
      for (int i = 0; i < 8; i++){
      action1();
      }
      lcd.clear();
      lcd.print("SESSION");
      lcd.setCursor(0,1);
      lcd.print("ENDED");
      for (int i = 0; i <3; i++){
        digitalWrite(buzzerpin, HIGH);
        delay(100);
        digitalWrite(buzzerpin, LOW);
        delay(100);
      }
      delay(1000);
      updateMenu3();
      flag = 2;
      count = 0;
      break;

      case 8:
      lcd.clear();
      flag = 2;
      for (int i = 0; i < 9; i++){
      action1();
      }
      lcd.clear();
      lcd.print("SESSION");
      lcd.setCursor(0,1);
      lcd.print("ENDED");
      for (int i = 0; i <3; i++){
        digitalWrite(buzzerpin, HIGH);
        delay(100);
        digitalWrite(buzzerpin, LOW);
        delay(100);
      }
      delay(1000);
      updateMenu3();
      flag = 2;
      count = 0;
      break;

      case 9:
      menu = 1;
      flag = 0;
      updateMenu();
      
      break;

      case 10:
      menu = 9;
      break;
  }
  
}

//---------------------- 30 minutes pomodoro session program ---------------------------------------
void timedisplay(){
  minutes = 25;
  secondes = 0;
 
  lcd.clear();
  lcd.print("--- FOCUSING ---");
  
  while (minutes != 0 or secondes != 0){
    if(secondes == 0){
      lcd.setCursor(0,1);
      sprintf(timeline,"    %0.2d    %0.2d  ", minutes, secondes);
      lcd.print(timeline);
      delay(300);
      lcd.setCursor(7,1);
      lcd.print(":");
      lcd.setCursor(8,1);
      lcd.print(":");
      lcd.setCursor(7,1);
      lcd.print("");
      lcd.setCursor(8,1);
      lcd.print("");
      delay(700);
      secondes = 59;
      minutes --;
    }
    else{
      lcd.setCursor(0,1);
      sprintf(timeline,"    %0.2d    %0.2d  ", minutes, secondes);
      lcd.print(timeline);
      delay(300);
      lcd.setCursor(7,1);
      lcd.print(":");
      lcd.setCursor(8,1);
      lcd.print(":");
      lcd.setCursor(7,1);
      lcd.print("");
      lcd.setCursor(8,1);
      lcd.print("");
      delay(700);
      secondes --;
    }
  }
  lcd.setCursor(0,1);
  sprintf(timeline,"    %0.2d :: %0.2d  ", minutes, secondes);
  lcd.print(timeline);
  delay(1000);
  lcd.clear();
  lcd.print("-- COMPLETED! --");
  buzz();
  lcd.setCursor(3,1);
  lcd.print("REST TIME");
  delay(2000);

  minutes = 5;
  secondes = 0;
  
  lcd.clear();
  lcd.print("----- REST -----");
  while (minutes != 0 or secondes != 0){
    if(secondes == 0){
      lcd.setCursor(0,1);
      sprintf(timeline,"    %0.2d    %0.2d  ", minutes, secondes);
      lcd.print(timeline);
      delay(300);
      lcd.setCursor(7,1);
      lcd.print(":");
      lcd.setCursor(8,1);
      lcd.print(":");
      lcd.setCursor(7,1);
      lcd.print("");
      lcd.setCursor(8,1);
      lcd.print("");
      delay(700);
      secondes = 59;
      minutes --;
    }
    else{
      lcd.setCursor(0,1);
      sprintf(timeline,"    %0.2d    %0.2d  ", minutes, secondes);
      lcd.print(timeline);
      delay(300);
      lcd.setCursor(7,1);
      lcd.print(":");
      lcd.setCursor(8,1);
      lcd.print(":");
      lcd.setCursor(7,1);
      lcd.print("");
      lcd.setCursor(8,1);
      lcd.print("");
      delay(700);
      secondes --;
    }
  }
  lcd.setCursor(0,1);
  sprintf(timeline,"    %0.2d :: %0.2d  ", minutes, secondes);
  lcd.print(timeline);
  delay(1000);
  
  count++;
  total = count * 30;
      if (total >= 60){
        mins = total /60;
        sec = total%60;
      }
      else{
        mins = 0;
        sec = total;
      }
   lcd.clear();
      lcd.print("-- CHECKPOINT --");
        digitalWrite(buzzerpin, HIGH);
        delay(100);
        digitalWrite(buzzerpin, LOW);
        delay(100);
      lcd.setCursor(0,1);
      sprintf(countf, "COUNT:%0.2d   %0.2d:%0.2d", count, mins, sec);
      lcd.print(countf);
      delay(1000);
  if (flag == 0){
  updateMenu2();
  flag = 1;
  }
 }

//---------------------------- confirmation menu display -----------------------------------
void updateMenu2(){

  switch(menu){
    case 0: //auxiliary condition
    menu = 1;
    break;
    
    case 1: //Select option 1 - YES interface
    lcd.clear();
    lcd.print("-- CONTINUE ? --");
    lcd.setCursor(2,1);
    lcd.print("~YES");
    lcd.setCursor(11,1);
    lcd.print("NO");
    break;

    case 2: //Select option 2- NO interface
    lcd.clear();
    lcd.print("-- CONTINUE ? --");
    lcd.setCursor(3,1);
    lcd.print("YES");
    lcd.setCursor(10,1);
    lcd.print("~NO");
    break;

    case 3:
    menu = 2;
    break;
  }
}

//-------------------- confirmation to continue execution ---------------------------------------
void confirm(){
     switch(menu){
      case 1:
      delay(100);
      flag = 0;
      action1();
      break;

      case 2:
      delay(100);
      flag = 0;
      menu = 1;
      total = count * 30;
      if (total >= 60){
        mins = total /60;
        sec = total%60;
      }
      else{
        mins = 0;
        sec = total;
      }
      lcd.clear();
      lcd.print("---- SUMMARY ----");
      lcd.setCursor(0,1);
      sprintf(countf, "COUNT:%0.2d   %0.2d:%0.2d", count, mins, sec);
      lcd.print(countf);
      delay(2000);
      count = 0;

      
      updateMenu();
      break;
     }
}

// ------------------------ buzzer execution -------------------------------
void buzz(){
  for (int i = 0; i <3; i++){
        digitalWrite(buzzerpin, HIGH);
        delay(50);
        digitalWrite(buzzerpin, LOW);
        delay(50);
      }
}

//------------------------- welcoming message execution ---------------------
void mtone(int dx, int hz, unsigned long tm)
{
  unsigned long t = millis();
  unsigned long ns = (long)500000 / hz;
  
  // Repeats for tm milliseconds.
  // Sounds for tm milliseconds
  while(millis() - t < tm)
  {
    digitalWrite(dx, HIGH);
    delayMicroseconds(ns);
    digitalWrite(dx, LOW);
    delayMicroseconds(ns);
  }
}

Credits

edison0215

0 projects • 2 followers

Pomodoro with Arduino!

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

Schematic diagram via Tinker CAD.

Code

Pomodoro codiing

Credits

edison0215

Comments

Embed the widget on your own site

Pomodoro with Arduino!

Pomodoro with Arduino!

Things used in this project

Hardware components

Software apps and online services

Story

Schematics

Schematic diagram via Tinker CAD.

Code

Pomodoro codiing

Credits

edison0215

Comments

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